mislead by consultant

i called the call centre on 29.07.2015 - I asked if I can go to a podiatrist and how much the cost would be. the agent explained that I have fees up to +-R1700 which will be paid to the dr at the scheme rate. to my surprise I get a call from the doctor's offices to advise that the claim has not been paid and its up to R2030 I was expecting a call for me to pay in the difference?????? are they delivering service to mislead people or to put customers into debt. I am so upset right now I cannot believe I went ahead to see the dr and discovery wont pay!!! this is really shocking because the consultant told me not to worry about any fees. they will pay scheme rate.